- From: Charles McCathieNevile <chaals@opera.com>
- Date: Tue, 03 Jun 2008 13:39:32 -0300
On Mon, 02 Jun 2008 09:40:55 -0300, Matthew Paul Thomas <mpt at myrealbox.com> wrote: > Ian Hickson wrote on 27/05/08 07:47: >> >> On Mon, 12 Nov 2007, Matthew Paul Thomas wrote: >> >>> On Oct 30, 2007, at 6:01 PM, Ian Hickson wrote: >>>> >>>> On Mon, 13 Jun 2005, Matthew Thomas wrote: >> ... >>>>> Many applications provide inline help which is not a label, and the >>>>> same attributes would be appropriate here: <div rel="help" >>>>> for="phone-number"><p>The full number, including country code.</p> >>>>> <p>Example: <samp>+61 3 1234 5678</samp></p></div> >>>> >>>> How would UAs use this? >>> >>> UAs likely wouldn't, but scripts could. For example, a form might >>> include sparing help by default, with a style sheet hiding more >>> exhaustive help (as indicated by rel="help"). Then a script could add a >>> small help button after each control that has associated help (i.e. >>> each >>> control with name="x" where there exists an element on the page with >>> rel="help" for="x"). When a control's help button was clicked, the >>> control's help would be shown. >> ... >> The data-* attributes are intended for scripts like this. >> ... > > The disadvantage of using a data-* attribute is that more kinds of > mistakes would be undetectable by a validator. It would have no idea > that (a) the value of the attribute must be the ID of an element > elsewhere in the document, and (b) each value must be unique within the > document. Indeed. There is an attribute for this called contexthelp or something that JAWS implemented years ago, collaborating with the US Treasury or seomthing. I proposed it to the whatwg a couple of years ago but my recollection is that this was rejected as not useful or important or something. Certainly it seems mor sensible to go with existing implementation than to make up something incompatible, and it seems that using data-* means we will actually get several dozen different versions of this - using ARIA would be an approximately infinitely better alternative. > I wonder if the data-* attribute naming scheme could be classified > somehow to allow basic type checking like this. I expect there will be > other cases where authors want an attribute value to match the ID of an > element in the page. Sounds like a semantic web project to me, infobot. (Personally I think that would be useful, but at that point I'd switch to basing my work on XML anyway, where there are infrastructures for this kind of thing). cheers Chaals -- Charles McCathieNevile Opera Software, Standards Group je parle fran?ais -- hablo espa?ol -- jeg l?rer norsk http://my.opera.com/chaals Try Opera 9.5: http://snapshot.opera.com
Received on Tuesday, 3 June 2008 09:39:32 UTC